const std = @import("std");

pub fn downCast(comptime T: type, n: u64) error{InvalidRecord}!T {
    return std.math.cast(T, n) orelse return error.InvalidRecord;
}

pub fn utf8(s: []const u8) error{InvalidRecord}!void {
    if (!std.unicode.utf8ValidateSlice(s)) {
        return error.InvalidRecord;
    }
}